#include <stdio.h>
int main(void)
{
	int a = 0;
	int b = 0;
	int c = 0;
	 
	printf("请输入边长\n");
	scanf_s("%d %d %d", &a, &b, &c);
	if (a + b > c && a + c > b && b + c > a)
	{
		printf("能构成三角形\n");
		if (a == b && a == c && b == c)
		{
			printf("等边三角形\n");
		}
		else if (a == b || a == c || b == c)
		{
			printf("等腰三角形\n");
		}
		else if (a * a + b * b == c * c || a * a + c * c == b * b || b * b + c * c == a * a)
		{
			printf("直角三角形\n");
		}
		else
			printf("普通三角形\n");
	}
	else
		printf("不是三角形\n");
	return 0;
}